Large wood load and transport in a flood-free period within an inter-dam reach: a decade of monitoring the Dyje River, Czech Republic

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020699%3A_____%2F20%3AN0000028" target="_blank" >RIV/00020699:_____/20:N0000028 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/esp.4985" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/esp.4985</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/esp.4985" target="_blank" >10.1002/esp.4985</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large wood load and transport in a flood-free period within an inter-dam reach: a decade of monitoring the Dyje River, Czech Republic

Popis výsledku v původním jazyce

This study examined the large wood (LW) load and transport during the non-flood period (2009-2018) following major floods that occurred in 2002 and 2006 within the inter-dam reach of the Dyje River (Czech-Austrian border). The LW load was examined in 36 river corridor segments scattered within the reach in the 2009-2018 period. Two whole-reach surveys (2011 and 2019) on LW frequency and distribution were conducted, and the export of LW to the downstream reservoir was analysed between June 2013 and December 2018. In the period of non-flood discharges, the recruitment and depletion of LW were highly variable processes in space and time, leading to a considerable change in the total LW quantity. Whereas the total number of LW pieces decreased, the total LW volume increased because of the increasing dimensions of newly recruited pieces. The annual variability in the quantity of newly recruited pieces was better explained by the variation in the maximum annual discharges (y= 41.043ln(x) + 3.2737,R-2= 0.5352) than by the variability in the number of days with wind gusts >17.2 m/s (y= 1.5004x+ 82.096,R-2= 0.118). The land use change with the abandonment of human settlements after World War II and the progressive expansion of forest was the major historical factor driving the increased recruitment of LW to the river corridor. While the 2006 (>100-year RI) flood brought approximately 1,250 LW pieces to the reservoir, the 2013 (1.5-year RI) flood delivered 45 pieces. The long-term average monthly input of LW to the reservoir was 7.7 pieces. The exceptional low-magnitude flood of 2013, which occurred at the beginning of the monitoring period, was shown to be a threshold above which the number of LW pieces that floated to the dam significantly increased.

Název v anglickém jazyce

Large wood load and transport in a flood-free period within an inter-dam reach: a decade of monitoring the Dyje River, Czech Republic

Popis výsledku anglicky

This study examined the large wood (LW) load and transport during the non-flood period (2009-2018) following major floods that occurred in 2002 and 2006 within the inter-dam reach of the Dyje River (Czech-Austrian border). The LW load was examined in 36 river corridor segments scattered within the reach in the 2009-2018 period. Two whole-reach surveys (2011 and 2019) on LW frequency and distribution were conducted, and the export of LW to the downstream reservoir was analysed between June 2013 and December 2018. In the period of non-flood discharges, the recruitment and depletion of LW were highly variable processes in space and time, leading to a considerable change in the total LW quantity. Whereas the total number of LW pieces decreased, the total LW volume increased because of the increasing dimensions of newly recruited pieces. The annual variability in the quantity of newly recruited pieces was better explained by the variation in the maximum annual discharges (y= 41.043ln(x) + 3.2737,R-2= 0.5352) than by the variability in the number of days with wind gusts >17.2 m/s (y= 1.5004x+ 82.096,R-2= 0.118). The land use change with the abandonment of human settlements after World War II and the progressive expansion of forest was the major historical factor driving the increased recruitment of LW to the river corridor. While the 2006 (>100-year RI) flood brought approximately 1,250 LW pieces to the reservoir, the 2013 (1.5-year RI) flood delivered 45 pieces. The long-term average monthly input of LW to the reservoir was 7.7 pieces. The exceptional low-magnitude flood of 2013, which occurred at the beginning of the monitoring period, was shown to be a threshold above which the number of LW pieces that floated to the dam significantly increased.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Earth Surface Processes and Landforms

ISSN

1096-9837

e-ISSN

—

Svazek periodika

45

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

3540-3555

Kód UT WoS článku

000565371800001

EID výsledku v databázi Scopus

2-s2.0-85090131491